var changeFlag = true;
function blink(divID,fcolor,bcolor,sec) {
	if (document.all) {
		blinkOBJ = document.all[divID].style;
	}
	if (document.getElementById) {
		blinkOBJ = document.getElementById(divID).style;
	}
	changeFlag = !changeFlag;
	if (!changeFlag) {
		blinkOBJ.color = fcolor;
		blinkOBJ.backgroundColor = bcolor;
	} else {
		blinkOBJ.color = bcolor;
		if (sec < 0) blinkOBJ.backgroundColor = fcolor;
	}
	setTimeout("blink('"+divID+"','"+fcolor+"','"+bcolor+"',"+sec+")",Math.abs( sec ));  //再帰。secをMath.abs()で整数にする。
}
blink("blink1","red","white",1000);
blink("new3","red","yellow",200);
blink("new4","red","yellow",-200); //負数は背景色点滅
blink("new5","red","yellow",-700);